Prep the chicken: Pat the chicken dry with paper towels. Toss with Cajun seasoning, a pinch of salt, and a drizzle of oil.
Set aside while you prep the vegetables.
Rice the cauliflower (if making your own): Cut the cauliflower into florets and pulse in a food processor until it resembles rice. Don’t over-process, or it turns mushy.
Sear the chicken: Heat 1–2 tablespoons oil in a large skillet over medium-high heat. Add the chicken in a single layer.
Cook 4–6 minutes, flipping once, until browned and cooked through. Remove to a plate and tent with foil.
Sauté aromatics: In the same pan, reduce heat to medium. Add a bit more oil if needed.
Add onion and bell pepper. Cook 3–4 minutes until softened. Stir in garlic and cook 30 seconds until fragrant.
Cook the cauliflower rice: Add the riced cauliflower to the skillet.
Season with a pinch of salt, black pepper, and 1 teaspoon Cajun seasoning. Toss well. Cook 4–6 minutes, stirring occasionally, until tender but not soggy.
Add moisture and flavor: Pour in the chicken broth and a small knob of butter (optional).
Stir and let it absorb for 1–2 minutes. This keeps the rice juicy and flavorful.
Finish the dish: Return the chicken to the skillet with any juices. Squeeze in half a lemon, add a little zest, and toss to combine.
Taste and adjust seasoning. Add more cayenne or hot sauce if you like extra heat.
Garnish and serve: Sprinkle with chopped parsley or green onions. Serve hot with lemon wedges on the side.